JPH0817728B2 - Latch mechanism of drawer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to a drawer latch mechanism in a filing cabinet or the like.

2. Description of the Related Art Conventionally, in a filing cabinet or the like, a latch mechanism for fixing the drawer to the cabinet in a housed state so that the drawer does not unexpectedly pop out due to external vibration such as an earthquake is disclosed in, for example, Japanese Utility Model Publication No. 60-23412. It is known in the art, the configuration is provided at one end of a horizontal rotating rod that is rotated by the tilting of the operating member arranged in the pulling member, an operating portion that bends at a right angle, and at the upper end, A latch lever, which has an L-shaped abutting portion that comes into contact with the actuating portion, and is horizontally rotatably held by a holding frame at a lower end portion of a vertical driven rod while always being elastically biased in one direction. Is provided, and the driven rod is rotated by the tilting operation of the operating member to release the locked state between the latch lever and the latch stopper.

SUMMARY OF THE INVENTION However, according to the above-described conventional configuration, the rotating rod supporting the operating member and the operating portion provided at one end of the rotating rod are engaged with each other separately from the pulling member. Since the guide member for restricting the movement is attached via the support pieces provided on the back plates constituting the front part of the drawer, the mounting work requires a lot of labor for the production and the cost becomes high. At the same time, since the pulling member and the operating member are not integrated, it is inconvenient to adjust the positional relationship between them.

The present application is intended to solve the above-mentioned inconvenience.

Means for Solving the Problems In order to achieve the above-mentioned object, the present application integrally provides a pulling member with a bearing portion that rotatably supports a rotating rod, and
A holding frame that holds the latch lever is integrally provided with a guide member that engages an operating portion that is provided by bending the rotary rod, and the drawer member and the holding frame are attached to the back plates that form the drawer, respectively. In the above description, the bearing portions are integrally provided on the left and right sides of the pulling member, and the guide groove is formed by a pair of left and right hanging pieces.

Therefore, the pivoting rod supporting the operating member is rotatably supported by the bearing portion provided on the pulling member, the operating member is arranged on the pulling member, and in this state, the pulling member is attached to the front portion of the drawer. It is attached to the back plate to be constructed. On the other hand, the holding frame holding the latch lever is mounted on the back plate in the same manner as in the conventional case, and the operating portion provided on the rotating rod is engaged with the guide groove of the guide member provided integrally with the holding plate. Its lateral position is regulated, and the contact portion of the judo rod is pressed against the operating portion by the elastic force of the latch lever. Then, when the drawer is stored in the cabinet in this state, the latch lever engages with the latch stopper provided on the inner side surface of the cabinet due to the elastic force. In this locked state, when the operating member is tilted by interposing a hand on the pulling member, the rotating rod is rotated, and the rotation is transmitted to the driven rod, and the latch lever is rotated horizontally against the elastic force. It moves and separates from the latch stopper, and the latched state of the drawer is released.

Example Hereinafter, based on the drawings, an example of the present application will be described in detail.
FIG. 1 is a vertical side view of the front part of the drawer (1). This drawer (1) has a back plate (3) vertically provided on the front surface of the container (2), and at the front thereof, A face plate (4) is attached, and at a central position of the face plate (4), there is provided a handle mouth portion (6) having an inward engaging rib (5) on the periphery.

The back plate (3) is bent at the upper edge and the left and right side edges, respectively, and is bent forward to project horizontally, and a collar piece (8) having a step portion (7) along an intermediate position of the projecting length. ), And the lower edge is also integrally provided with a collar piece (10) which horizontally projects and has a downwardly projecting ridge (9) along an intermediate position of the protruding length.

The front surface plate (4) is bent to the upper edge and the left and right side edges, respectively, and then bent rearward to horizontally project, and engages with the stepped portion (7) of the brim piece (8) along the leading edge thereof. Cover piece (12) that overlaps with the flange piece (8) having a downward engaging piece (11)
Similarly, at the lower edge as well, it is bent rearward and protrudes horizontally to form an upward protruding ridge (13) along the middle position of the protruding length, and this ridge (13) At the position
Mounting pieces (14) fixed to the collar pieces (10) are integrally provided. FIGS. 4 to 6 show a pull tab member (15), which has a bottom plate, a back plate, and left and right side plates, and a paragraph at the bottom between the upper front edges of the left and right side plates. A horizontally long frame body (17), which is formed by horizontally crossing a horizontal crosspiece (16) having a portion (16) ', and is provided along the front edge of the bottom plate of the frame body (17) along part of the front edge of the left and right side plates. And a rotating rod (30) to be described later, which is provided upright on the upper surface of one side plate.
One bearing portion (20) having a bearing hole (19) for rotatably supporting one end of it and the other side plate upper surface are provided so that a turning rod (30) described later is clamped from the front and rotatable. The other bearing portion (21) to be supported and the mounting portion (2) provided on the outer surface of one side plate near the rear surface and having one mounting hole (22).
3) and the other mounting hole (24) provided in the other side plate facing the mounting hole (22), and the pull tab member (15) is molded of synthetic resin.

FIG. 7 shows an operating member (27) interposed in the pulling member (15). This operating member (27) has a vertically long fitting hole (28) with an open front surface at the upper part. At the bottom,
It is made of a horizontally long synthetic resin in which an inclined portion (29) inclined forward is integrally formed.

FIG. 8 shows the rotating rod (30), which has a short actuating portion (32) bent at a right angle at one end of a long horizontal portion (31).
And two V-shaped bent portions (33) and (33) are formed in a part of the horizontal portion (31).

The pulling member (15), the operating member (27), and the rotating rod (30) configured as described above are first rotated from the front surface into the fitting hole (28) of the operating member (27). Horizontal part of rod (30) (3
The positions of the bent portions (33) and (33) of 1) are press-fitted to support the operating member (27) on the rotating rod (30), and then the operating member (2).
Rotating rod (30) so that 7) intervenes in the frame (17).
After rotatably supporting the horizontal portion (31) of each of the horizontal portions (31) on the left and right bearing portions (20) and (21), the pull tab member (15) is attached to the back plate (3) through the mounting holes (22) and (24). Attach it to the front of the machine with a set screw. The driven rod (35) to which the turning action of the turning rod (30) is transmitted is provided with an abutting portion (36) at an upper portion thereof, which is bent into an L shape and comes into contact with the operating portion (32). Further, the rear end of the latch lever (38) is attached to the lower portion so as to move in the rotational direction, for example, by engaging the square shaft portion and the square hole, and the latch lever (38) is provided with a spring (not shown). (1) is held in a vertically rectangular holding frame (40) having an open back so as to be horizontally rotatable while being elastically biased in one direction. As shown in FIG. 9, the holding frame (40) has a back plate on two longitudinal sides of the back surface so that the holding frame (40) can be mounted by being fitted into a rectangular mounting hole provided on a side portion of the back plate (3). The receiving rib (41) is lowered by one step corresponding to the thickness of (3), and the projecting piece (42) protruding downward in an L shape corresponding to the thickness of the back plate (3) is also provided on the lower side thereof. Locking pieces (45) each having an elastic force released by two parallel cut grooves (43) and having a locking projection (44) at the leading edge are provided on the upper surface. At the same time, a guide portion piece (47) having a guide groove (46) which is bent upward and extends upward and which is opened at the upper and lower sides and the front surface by a pair of opposing hanging pieces is provided on the outer surface of the one side. It is provided integrally.

The holding frame (40) configured as described above is mounted in a mounting hole formed in a side portion of the back plate (3), and the rotating rod is inserted in the guide groove (46) of the guide piece (47). The actuating portion (32) of the (30) is engaged to restrict the lateral movement of the rotating rod (30), and the urging force acting on the latch lever (38) applies a force to the driven rod (35). The contact part (36) is pressed against the lower part of the operating part (32) of the rotating rod (30).

As described above, the back plate (3) is provided with a pulling member (15) including a rotating rod (30) and an operating member (27), and a holding frame (40) including a driven rod (35) and a latch lever (38). ) Are respectively attached, the cover piece (12) of the surface plate (4) is superposed on the flange piece (8) of the back plate (3), and the engagement piece (11) is engaged with the step portion (7). The engaging ribs (5) provided on the pull handle opening (6),
By engaging the paragraph portions (16) 'and (18) of the frame body (17) with each other and superposing the mounting piece (14) on the collar piece (10) and fixing them by, for example, a set screw, a back plate. The face plate (4) is attached to (3).

In the normal state, the latch lever (38)
By being biased in one direction, as shown in FIG. 3, the drawer (1) engages with the latch lever (49) projecting from the inner wall of the cabinet (48), and the drawer (1) moves to the cabinet ( It is latched when it is stored in 48). From this latched state, a hand is inserted into the pulling member (15) from the pulling handle opening (6) to pull out the drawer (1), and the vertically operating member (27) is pulled toward the operating member. Due to the tilting of (27), the operating part (32) of the rotating rod (30) also tilts toward the front side, and the contacting part (36) press-contacting this operating part (32),
When it is pressed in the front direction, the latch lever (38) rotates horizontally with the follower rod (35) against the elastic force, and the latch lever (38) separates from the latch stopper (49) and the drawer ( The latched state of 1) is released, and in this state, the drawer (1) is pulled out in the front direction.

In addition, when the drawer (1) is pulled out and the latch lever (38) is elastically biased, the drawer (1) is pushed into the cabinet (48), and the tip of the latch lever (38) becomes a latch stopper (38). While climbing the inclined surface of (38), it tilts against the urging force and then the latch stopper (3
8) automatically lock.

EFFECTS OF THE INVENTION As described above, according to the present application, the pulling lever supporting the operating member is rotatably attached to the pulling member, and the pulling member is attached to the drawer. Since the unity is obtained, it is convenient for adjusting the positional relationship between them, and it is not necessary to attach the rotating rod to the drawer separately from the pulling member, and the operating portion of the rotating rod is attached to the holding frame. In addition, since a guide member for regulating the lateral movement of the drawer is provided, it is not necessary to attach the guide member to the drawer separately, which is convenient for the production, and the length of the cabinet is different in order to produce cabinets having different widths of the drawer. Even when different rotating rods are used, there is an advantage that the holding frame having the guide member can be shared without changing.

[Brief description of drawings]

The drawings show an embodiment of the present application. FIG. 1 is a vertical sectional side view equipped with a latch mechanism, FIG. 2 is a partially omitted front view, FIG. 3 is a partially omitted top view, and FIG. FIG. 5 is a perspective view of the pull tab member, FIG. 5 is a front view of the pull tab member, FIG. 6 is a vertical sectional view of the pull tab member, FIG. 7 is a perspective view of the operating member, FIG. 8 is a perspective view of the rotating rod, and FIG. The drawing is a partially cutaway perspective view of a holding frame provided with a driven rod, a latch lever, and a guide member. In the figure, (1) is a drawer, (3) is a back plate, (4) is a front plate,
(15) is a pulling member, (20) and (21) are bearing portions, (27) is an operating member, (30) is a rotating rod, (32) is an operating portion, (35) is a driven rod, and (36). Is the contact portion, (38) is the latch lever, and (4
(0) is a holding frame, (46) is a guide groove, (47) is a guide member, (4)
8) is a cabinet and (49) is a latch stopper.

Claims (3)

[Claims] 1. An operating portion bent at a right angle is provided at one end of a horizontal rotating rod which is rotated by tilting of an operating member arranged in a pulling member, and the operating portion is provided at the upper end. At the lower end of a vertical driven rod having an L-shaped abutting portion for abutting, there is provided a latch lever that is horizontally rotatably held by a holding frame while being elastically biased in one direction at all times. In the drawer latch mechanism configured to rotate the driven rod to release the locked state of the latch lever and the latch stopper by tilting the operating member, the pulling member is rotatably supported by the pulling member. A guide member having a bearing groove integrally provided, and a holding frame having a guide groove for engaging the operating portion of the rotary rod,
A latch mechanism for a drawer, wherein the pulling member and the holding frame are integrally provided and attached to a back plate constituting the drawer, respectively. 2. A latch mechanism for a drawer according to claim 1, wherein bearing portions are integrally provided on the left and right side portions of the pulling member. 3. The drawer latch mechanism according to claim 1, wherein the guide groove is formed by a pair of left and right hanging pieces.